Oct 20 – 25, 2019
America/Mexico_City timezone

Perspectives of Deep learning techniques in Lattice 1+1d Scalar Field Theory

Oct 21, 2019, 2:50 PM
20m
Oral Physics and astronomy Submitted contributions

Speaker

Dr Kai Zhou (FIAS, Goethe-University Frankfurt am Main)

Description

We explore the perspectives of machine learning techniques in the context of quantum field theories based on our recent publication[1]. In particular, we discuss two-dimensional complex scalar field theory at nonzero temperature and chemical potential – a theory with a nontrivial phase diagram. A neural network is successfully trained to recognize the different phases of this system and to predict the value of various observables, based on the field configurations. We analyze a broad range of chemical potentials and find that the network is robust and able to recognize patterns far away from the point where it was trained. Aside from the regressive analysis, which belongs to supervised learning, an unsupervised generative network is proposed to produce new quantum field configurations that follow a specific distribution. An implicit local constraint fulfilled by the physical configurations was found to be automatically captured by our generative model. We elaborate on potential uses of such a generative approach for sampling outside the training region.

[1] Phys.Rev. D (R)100 (2019) no.1, 011501

Primary author

Dr Kai Zhou (FIAS, Goethe-University Frankfurt am Main)

Co-authors

Gergely Endrodi (University of Regensburg) Long-Gang Pang (lbnl) Horst Stoecker (GSi)

Presentation materials